<template>
	<view>
		<my-search @click="gotoSearch"></my-search>
		<!-- <my-search :bgcolor="'pink'" :radius="3"></my-search> -->
		<view class="scroll-view-container">
			<!-- 左侧滑动区域 -->
			<scroll-view class="left-scroll-view" :style="{height:wh+'px'}" scroll-y="true" >
				<block v-for="(item,i1) in cateList" :key="i1">
					<view @click="cataAddClass(i1)" :class="['left-scroll-view-item',i1===active?'active':'']">{{item.cat_name}}</view>
				</block>
				
				
			</scroll-view>
			
			<!-- 右侧滑动区域 -->
			<scroll-view class="right-scroll-view" :style="{height:wh+'px'}" :scroll-top="scrollTop" scroll-y="true" >
				<view class="cate-level2" v-for="(item2,lv2) in catelevel2" :key="lv2">
					<view class="cate-level2-title">/ {{item2.cat_name}} /</view>
					<!-- 三级分类 -->
					<view class="cate-level3-list">
						<!-- 三级分类里面的每一项 -->
						<view class="cate-level3-item" v-for="(item3,index) in item2.children" :key="index"  @click="gotoGoodsList(item3)">
							<!-- 图片 -->
							<image class="cate-level3-item-img" :src="item3.cat_icon" ></image>
							<text class="cate-level3-item-title"> {{item3.cat_name}} </text>
						</view>
						
					</view>
				</view>
				
			</scroll-view>
			
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				// 当前设备可用高度
				wh:0,
				// 分类数据
				cateList:[],
				active:0,
				// 二级分类数据
				catelevel2: [],
				scrollTop:0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight-50
			
			this.getCateList()
		},
		methods:{
			// 获取分类列表的数据
			async getCateList(){
				const {data:res} = await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status!==200) return uni.$showMsg()
				 this.cateList = res.message
				 this.catelevel2 =  res.message[0].children
			},
			// 切换左侧scroll，修改样式
			cataAddClass(index){
				 this.active = index
				 // 重新为二级分类赋值
				 this.catelevel2 = this.cateList[index].children
				 
				 this.scrollTop = this.scrollTop === 0 ? 1:0
			},
			gotoGoodsList(item3){
				console.log(item3)
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+item3.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/my-search/my-search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;
		.left-scroll-view{
			width: 120px;
			.left-scroll-view-item {
				background-color: #F7F7F7;
				line-height: 60px;
				font-size: 16px;
				text-align: center;
				&.active{
					background-color: #FFFFFF;
					position: relative;
					&::before {
						content: '';
						display: block;
						width: 3px;
						height: 30px;
						background-color: #C00000;
						position: absolute;
						top: 50%;
						left: 0;
						transform: translateY(-50%);
					}
				}
			}
		}
	}
	
	.cate-level2-title {
		font-size: 12px;
		text-align: center;
		font-weight: bold;
		padding: 15px 0;
	}
	
	.cate-level3-list {
		display: flex;
		flex-wrap: wrap;
		.cate-level3-item{
			width: 33%;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items:center ;
			margin-bottom: 10px;
			
			image{
				width: 60px;
				height: 60px;
				
			}
			text{
				font-size: 12px;
			}
		}
		
		
	}

</style>
